The Research Of Distinguished Priority Service In Two-way CATV Transmission Network

At present, the digital cable TV network two-way transmission network is in a pilot project construction, and is also a critical period of NGB network construction. In an effort to cooperate three nets fusion of pilot work, meet the needs of the masses of business and various value-added businesses, the digital cable TV network two-way network renovation construction actively. After transforming the digital cable television network will change the original one-way broadcast transmission network, upgrade become able to have two-way transmission network of broadband, two-way, business more rich and colorful interactive and value-added service to satisfy customers.This thesis is based on Yunnan province bureau of radio and television projects "the two-way radio and TV cable network modification technology research" as the research background, from cable TV transmission network construction background, technical standards and construction scheme of different performance characteristics, project cost, options, etc is analyzed, as well as the advantages and disadvantages of each technology solutions are analyzed.The core content of this article is the priority service applications in CATV two-way transmission network, with the increase of access users, how to reasonable allocate resources, according to the priority of the user, the business of real-time and fairness as well as the QOS guarantee to distinguish the priority service polling system now has become one of the research hot spot. Proposed the application of the starting point is:with the cable TV network two-way transformation, provides the basis for interactive and personalized business conditions, the corresponding request service way refinement, comparing with the telecommunication system for service quality gap of radio and television systems, has more practical significance. By establishing the model user groups, with the aid of theoretical calculations and simulation experiment, the ordinary user and VIP user to enjoy service to ensure the average queue length, average waiting time and other related parameters, and these parameters with the change of number of users increase. Which is light and radio and television networks nodes is more and more close to the user; Each light node covering the number of users will gradually reduce the trend of the development of consistent, priority service polling system in the network two-way reconstruction project really has a certain guiding significance and practical significance.Last two-way transmission network based on the current existing problems put forward a series of related measures, two-way cable TV transmission network has helped to give full play to the advantages of cable television network, prompting the construction of the multimedia information platform of families become, to meet the general public in our country of future demand for a variety of business development and user access bandwidth demand increase gradually, and to better promote the nets.